package com.sun.method;

public class Demo06 {

    public static void main(String[] args) {
        System.out.println(f(5));
    }

    //2! 2*!
    //3! 3*2*1
    //5! 5*4*3*2*1

    //

    public static int f(int n){

        if (n==1){
            return 1;
        }else {
            return n*f(n-1);
        }
    }
}
